Central thermostat



FIG. 1 is a top, front and right side perspective view of a central thermostat showing our new design;

FIG. 2 is a top plan view;

FIG. 3 is a right side elevational view;

FIG. 4 is a left side elevational view;

FIG. 5 is a bottom plan view;

FIG. 6 is a rear elevational view; and

FIG. 7 is a front elevational view thereof. 

The ornamental design for a central thermostat, as shown and described. 